摘要
坝体接缝变形是混凝土拱形重力坝安全稳定的重要监测效应量。结合混凝土拱形重力坝不同结构部位受力特点,对乌江渡水电站1983—2013年间的坝体接缝变形监测数据分析表明:坝体纵、横缝变形测值均随坝址气温呈现明显的年周期性变化,变形测值逐年和多年变幅相对较小且趋于稳定,能够反映混凝土拱形重力坝接缝变形的发展规律;另外,针对坝体重点接缝变形部位且可修复或更换的监测仪器提出了建议,可为大坝日常观测维护提供参考。
Dam joint deformation is an important factor that affect the effectiveness of monitoring for the safety and stability of arch gravity dams.Combined with the stress characteristics of different structural parts of concrete arch gravity dam,analysis of dam joint deformation monitoring data of Wujiangdu Hydropower Station from 1983 to 2013 indicates that the longitudinal and transverse joint deformation of the dam body shows an obvious annual periodic change with the temperature at the dam site,and the annual variations of deformation measurements are relatively small and tend to be stable,which reflects the development law of joint deformation of concrete arch gravity dam.In addition,some suggestions are given for the monitoring instruments which can be repaired or replaced in key joint deformation parts of dam body,providing reference for daily dam observation and maintenance.
作者
马传彬
文富勇
MA Chuanbin;WEN Fuyong(PowerChina Zhongnan Engineering Corporation Limited,Changsha 410014,China;Hunan Provincial Key Laboratory of Hydropower Development Key Technology,Changsha 410014,China)
出处
《西北水电》
2022年第4期85-89,共5页
Northwest Hydropower
关键词
混凝土拱形重力坝
坝体接缝变形
监测分析
乌江渡水电站
concrete arch gravity dam
joint deformation of dam body
monitoring data analysis
Wujiangdu Hydropower Station
